On 12/21/2011 02:28 PM, Andrew Morton wrote: > On Wed, 21 Dec 2011 11:05:48 -0600 > Dave Kleikamp <dave.kleikamp@xxxxxxxxxx> wrote: > >> [ updated to remove now-obsolete comment in read_cache_page_gfp()] >> >> lockdep reports a deadlock in jfs because a special inode's rw semaphore >> is taken recursively. The mapping's gfp mask is GFP_NOFS, but is not used >> when __read_cache_page() calls add_to_page_cache_lru(). > > Well hang on, it's not just a lockdep splat. The kernel actually will > deadlock if we reenter JFS via this GFP_KERNEL allocation attempt, yes? Yes, it could result in a real deadlock. > Was that GFP_NOFS allocation recently added to JFS? If not then we > should backport this deadlock fix into -stable, no? Yes, that would make sense. Shaggy -- To unsubscribe from this list: send the line "unsubscribe kernel-testers" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
